feat(studio): first-run UX, recovery affordances, l10n, bundled fonts

- Connection-aware Welcome: when the hub is down, show a hero with a
  primary "Start hub" CTA + install fallback instead of a dead,
  all-unchecked onboarding checklist (the first-run cliff).
- Actionable binary-not-found (file picker + install link, not a
  "set FAI_BIN" dead end) and a connect-failure banner after
  repeated failed health polls.
- Localize six hardcoded English error/toast clusters (DE+EN ARB).
- Bundle Inter + JetBrains Mono as assets; drop the runtime
  google_fonts fetch (air-gap / KRITIS safe, no font-swap flash).

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

pubspec.lock

@@ -57,14 +57,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.2"
-  code_assets:
-    dependency: transitive
-    description:
-      name: code_assets
-      sha256: "67cf6d84013f9c601e42a6f8a6b74c4c0d9dc1a1619d775f2b28b732d3551b85"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.2.0"
   collection:
     dependency: transitive
     description:
@@ -235,14 +227,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.5.0"
-  google_fonts:
-    dependency: "direct main"
-    description:
-      name: google_fonts
-      sha256: "4e9391085e524954a51e3625b7c9c7e9851dc3f376603208bb45c24b9a66255d"
-      url: "https://pub.dev"
-    source: hosted
-    version: "8.1.0"
   google_identity_services_web:
     dependency: transitive
     description:
@@ -283,14 +267,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.2.3"
-  hooks:
-    dependency: transitive
-    description:
-      name: hooks
-      sha256: a41af4e8fc687cd6d33de9751eb936c8c0204ebe2bcb6c15ecf707504bf47f31
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.0"
   http:
     dependency: transitive
     description:
@@ -323,22 +299,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.20.2"
-  jni:
-    dependency: transitive
-    description:
-      name: jni
-      sha256: c2230682d5bc2362c1c9e8d3c7f406d9cbba23ab3f2e203a025dd47e0fb2e68f
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.0"
-  jni_flutter:
-    dependency: transitive
-    description:
-      name: jni_flutter
-      sha256: "8b59e590786050b1cd866677dddaf76b1ade5e7bc751abe04b86e84d379d3ba6"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.1"
   leak_tracker:
     dependency: transitive
     description:
@@ -379,14 +339,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.0"
-  logging:
-    dependency: transitive
-    description:
-      name: logging
-      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.3.0"
   markdown:
     dependency: transitive
     description:
@@ -427,22 +379,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.5"
-  objective_c:
-    dependency: transitive
-    description:
-      name: objective_c
-      sha256: "6cb691c686fa2838c6deb34980d426145c2a5d537491cb83d463c33cdbc726ed"
-      url: "https://pub.dev"
-    source: hosted
-    version: "9.4.1"
-  package_config:
-    dependency: transitive
-    description:
-      name: package_config
-      sha256: f096c55ebb7deb7e384101542bfba8c52696c1b56fca2eb62827989ef2353bbc
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.0"
   path:
     dependency: "direct main"
     description:
@@ -451,30 +387,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
-  path_provider:
-    dependency: transitive
-    description:
-      name: path_provider
-      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.5"
-  path_provider_android:
-    dependency: transitive
-    description:
-      name: path_provider_android
-      sha256: "69cbd515a62b94d32a7944f086b2f82b4ac40a1d45bebfc00813a430ab2dabcd"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.3.1"
-  path_provider_foundation:
-    dependency: transitive
-    description:
-      name: path_provider_foundation
-      sha256: "2a376b7d6392d80cd3705782d2caa734ca4727776db0b6ec36ef3f1855197699"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.6.0"
   path_provider_linux:
     dependency: transitive
     description:
@@ -531,22 +443,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.0.0"
-  pub_semver:
-    dependency: transitive
-    description:
-      name: pub_semver
-      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.0"
-  record_use:
-    dependency: transitive
-    description:
-      name: record_use
-      sha256: "2551bd8eecfe95d14ae75f6021ad0248be5c27f138c2ec12fcb52b500b3ba1ed"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.6.0"
   scrollable_positioned_list:
     dependency: transitive
     description:
@@ -802,4 +698,4 @@ packages:
     version: "3.1.3"
 sdks:
   dart: ">=3.11.0 <4.0.0"
-  flutter: ">=3.38.4"
+  flutter: ">=3.38.0"